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arXiv · 1404.0492

Mechanical magnetometry of Cobalt nanospheres deposited by focused electron beam at the tip of ultra-soft cantilevers

Hugo Lavenant·Vladimir V. Naletov·Olivier Klein·Grégoire De Loubens·Casado Laura·Jose Maria De Teresa
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Abstract

Using focused-electron-beam-induced deposition, Cobalt magnetic nanospheres with diameter ranging between 100 nm and 300 nm are grown at the tip of ultra-soft cantilevers. By monitoring the mechanical resonance frequency of the cantilever as a function of the applied magnetic field, the hysteresis curve of these individual nanospheres are measured. This enables to evaluate their saturation magnetization, found to be around 430 emu/cm^3 independently of the size of the particle, and to infer that the magnetic vortex state is the equilibrium configuration of these nanospheres at remanence.

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Hugo Lavenant, Vladimir V. Naletov, Olivier Klein, Grégoire De Loubens, Casado Laura, Jose Maria De Teresa. 2014-04-02. Mechanical magnetometry of Cobalt nanospheres deposited by focused electron beam at the tip of ultra-soft cantilevers. https://arxiv.org/abs/1404.0492

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